Combined ventilating and purging blower



FIG. 1 is a top plan view of a combined ventilating and purging blower showing my new design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation thereof; and,

FIG. 5 is a front elevation thereof.

The left side elevation is a mirror image of the right side elevation shown in FIG. 2. 

The ornamental design for a combined ventilating and purging blower, as shown and described. 